Studies On On-line Monitoring System And Fault Diagnosis Of High Voltage Electric Equipment In Substation

The high-voltage electric power equipment in substation lays off during the out of service to be examined and repaired become more and more impossible. The condition-based maintenance can solve this problem perfectly. In order to detect abnormal symptom or terminative evidence of the working-life, the on-line monitor and diagnose about high-voltage electric power equipment is necessary.On the base of consulting a great amount of materials, a deep research on on-line monitoring and fault diagnosis system of high voltage electric equipment in substation was done in this thesis. The method of insulative on-line monitoring and fault diagnosis is emphatically discussed, and a safe, credible, and real-time monitoring system will be obviously provide more advantageous condition for condition-based maintenance. The basic conception and principle of on-line monitoring and fault diagnosis are illustrated, and the prospect of new technology application in on-line monitoring is discussed.In this thesis the high voltage electric capacity equipment is adapted as on-line object of monitor and diagnose system. The system's structure of high voltage electric equipment is introduced, and the possible to each error occuring in high voltage capacity type equipments during the monitoring, analysis and judgment is given. This paper emphasized the application of synthetic intelligence technology. The hierarchical structure of diagnose is proposed, and the analysis the synthetic diagnosis is realized primarily.At last, the the feasibility and validity of monitor and diagnose on-line's system of early hider faults is demonstrated in practical examples.